tub coating

例句：

1. 1. Thenew paint job on the truck is agreat improvement over its previous coating.
   卡车上的新油漆工作比之前的涂层有了很大改善。
2. 2. The engineer used a special material tocoat the pipes in the factory.
   工程师使用了一种特殊的材料来给工厂的管道涂上保护层。
3. 3. The company decided to replacethe old tub coating with a more durablematerial.
   公司决定用更耐用的材料替换旧的桶涂层。